\\[-1.8ex] Soil Heterogeneity & $-$2.603$^{***}$ & $-$0.045$^{**}$ & $-$0.403$^{**}$ & $-$0.432$^{***}$ & $-$0.058$^{**}$ & $-$0.016 & $-$0.101 \\ 
  & (0.864) & (0.021) & (0.172) & (0.147) & (0.024) & (0.016) & (0.152) \\ 
  & & & & & & & \\ 
Observations & 20,785 & 20,779 & 20,678 & 17,622 & 20,791 & 20,872 & 19,212 \\ 
R$^{2}$ & 0.553 & 0.816 & 0.319 & 0.400 & 0.375 & 0.679 & 0.599 \\ 
